I posted this originally in the "Techniques" sub forum and someone suggested it might be helpful to post here as well.
I have never done any custom lighting and would like to include some in some of my Sci-Fi kits (Star Trek, Star Wars, BSG, etc.).
I know that I will I need to match up the LEDs with the correct battery voltage, include resistors, etc., but I am fuzy on the terminology and correct math. Does anyone have any advice on guides or links to sites that explain it well? I have heard that there may be some online tools that will help a novice calculate the correct battery voltage, LED rating, resitors, etc. Any help would be greatly appreciated.
(Edit): I am mostly interested in understanding the electrical math between the LEDs, battery power, resitors, etc.
Thanks